/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.confignode.manager.load.heartbeat;

import java.util.concurrent.atomic.AtomicInteger;

public class RegionGroupCache implements IRegionGroupCache {

  // TODO: This class might be split into SchemaRegionGroupCache and DataRegionGroupCache

  private long timestamp;

  private final AtomicInteger leaderDataNodeId;

  public RegionGroupCache() {
    this.leaderDataNodeId = new AtomicInteger(-1);
  }

  @Override
  public synchronized void updateLeader(long timestamp, int dataNodeId) {
    if (timestamp > this.timestamp) {
      this.timestamp = timestamp;
      this.leaderDataNodeId.set(dataNodeId);
    }
  }

  @Override
  public int getLeaderDataNodeId() {
    return leaderDataNodeId.get();
  }
}
